Temperature sensitivity MRTD or MRT

Temperature sensitivity, also called thermal resolution or NETD for a radiation thermometer, is the smallest temperature ehange at the target surface that can be clearly sensed at the output of the instrument. For an imaging system, the term minimum resolvable temperature (MRT) or minimum resolvable temperature difference (MRTD) defines temperature sensitivity but also implies spatial resolution (IFOV). MRTD is expressed as a function of angular spatial frequency. [Pg.40]

For many years the test for MRTD has been accomplished by means of a subjective procedure developed by the Department of Defense community. This involves [Pg.40]

H = Total Horizontal Image Size = d(2tan(x/2)) V = Total Vertical Image size = d(2tan(y/2) [Pg.41]

Big Chemical Encyclopedia